Back-pedaling coaster-brake.



P. S. ELLETT.

BACK PEDALING GOASTER BRAKE.

APPLIOATION FILED MAY 1, 1908.

Patented June 35, 19%

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stares narnn'r FREDERICK S. ELLETT, OF ELMIRA, NEW YORK, ASSIGNOR TO ECLIPSE MACHINE OOM- PANY, OF ELM'IRA, NEW YORK.

BAOK-PEDALING COASTER-BRAC$ Specification of Letters Patent.

Application filed his 1, 3.908.

Patented June 15, ZQQQ.

Serial No. 4130, 100.

To all whom i may concern:

Be it known that l, Fnnonnicn S. ELLn'rr, a citizen of the United States, and resident of llhnira, in the county of Chemung and State of New York, have invented certain new and useful linprovcnients in Back Pedaling Coaster-Brakes, of which the following is a specification.

This invention relatesto back pedaling coaster brakes, and has for its object a powerful brake, reduction of friction on construction, and

the cone 4 which is screwed upon one end of i the axle. The sprocket in turn carries a ball race 5 for'one end of the driven hub 6. The opposite end of the driven hub revolubly supported by balls 7 in a race on the stationary brake block 8. The latter is represented as screwed upon the, end of theaxle and is held against rotation .by-a device that is one of the novel improvements for which protection is asked in a separate a plication,

Serial No. 462,822lt1consists-o a washer 9 that has upon its inner face a lug 10.,on each side of the axle, that is adaptedto ass through the slot'in the end of the rear ork 11 of the .velocipede frame, which receives the axle 1, and'enter a corresponding recess 12 in the stationar brake block 8. In addition to the inwar 1y projecting lug 10, the washer may have teeth 13 on its inner side to engage the outer side of the fork 11, for

the pur ose of preventin the slot in the end of the ork from sprea ing under the torsion put on the lug on back pedaling. The brake element of the device also contains novel features. Braking action is applied to the hub by an expansible friction brake element 14 that projects into it from the stationary block 8 to which it is anchored. An inwardly projecting diametral lug 15 on the block 8 effects the anchoring connection by entering a reuse in the expansible brake element, and t sleeve 16 that supports it. This sleeve is so recessed diametrically at 17 to receive the lug 15, so

that it is non-rcvoluble, though movable longitudinally to some extent.

The special. novelty of the brake lies in the use of a lever as a brake actuator that in turn is actuated by a .part'inovahle in line with the axis of the hub and operated the driver on back: pedaling.

In the construction shown in the draw ings, the brake proper 1a is a split ring, held against rotation as described, and the lever 18 is supported by the sleeve'lo between the edges '19 of the brake, while the latter is actuated by wedge 20 that is moved. longitudinally inwardly, on back pedaling, against a corresponding wedge face 91 on the lever. The wedge 20 is represented as formed on the flange 2:2 on the end of the sleeve 16, which is nonrotative and movable longitudinally as previously;explained; j cordingly, the split brake ring lei held at both sides against rotation by connection with nonrotary parts, namely, the diametral lug 15, and the-wedgeshaped shoulder. 90

that projects radially from the nonrotary sleeve 16.

Any suitable connector between the driv ing sprocket '2 and the Wedge 22 may be employed to cause the latter to move in upon the lever on back pedaling. In the drawings a longitudinally-shifting nut 23 is shown. This carries at one end a screw threaded sleeve 24 upon which thedriving sprocket is mounted, and at its other end a sleeve 25' that enters'the non-revoluble sleeve 16 and carries the retarder 26. On forward pedaling the same connector is employed to efiect driving connection between the sprocket- 2 and the hub, for when moved to the right it engages a friction surface 27 in the inside of the hub,

Finally, the retarder itself is a novel feature for which protection is desired. This consists of a split expansible ring 26 (see Fig. 5), the forward end of which is free and normally sprung outwardly against a nonrevoluble part of the mechanism, (in the construction shown it engages the nonrevoluble sleeve 16) and the other end of which is attached. to the sleeve 25 of the revoluble connector 23.

In the drawings, the connection between the retarding ring 26 and the sleeve 25 of the connector is effected by inserting the in wardly turned end 28 into aslit 29 the sleeve.

On forward pedaling the retarder checks the stationary sleeve 16. But on back pedaling the retarding ring 26 is opened out against the nonrevoluble sleeve 16, effectively holding the connector against rotation, so that backward rotation of the sprocket 2 causes the connector to move in against the Slewe 16, thereby forcing the wedge against the brake-actuating lever 18 and expanding the'brake out against the hub.

A more uniform expansion of the brake ring 14 is obtained if at its outer end, back of the lever, it is attached to the nonrevoluble sleeve 16, as by the lug 30 in the recess 31 in the flange 22 of the sleeve.

What I claim is:

1. In a coaster brake, the combination with an axle, of a hub revolubly supported thereon, a rotary driver for the hub; a nonrevoluble split brake'ring within the hub, and normally disengaged therefrom; a lever longitudinally disposed within the hub, and entering between separated edges of said brake ring; an actuator, adapted to move longitudinally to engage and operate said lever; and'cooperating means between the driver and actuatoroperated by the driver on back pedaling for moving said actuator longitudinally, substantially as shown and described.

2. In a coaster brake, the combination with an axle, of a hub revolubly supported thereon; a rotary driver for the hub; a nonrevoluble split brake ring within the hub, and normally disengaged therefrom; a lever longitudinally disposed within the hub, and enterin between separated edges of said brake rmg; a non-rotary actuator adapted to move longitudinally to engage and operate said .lever; and means operated by the reverse rotation of. the driver for movin said actuator longitudinally; substantially as shown and described.

3. In a coaster brake, the combination wit an axle, of a hub revolubly supported thereon; a rotary driver for the hub; a nonrevoluble split brake'ring within the hub, and

' normally disengaged therefrom; a lever, longitudinally disposed within the hub, and

entering between separated edges of said brake ring; a nonrotary wedge adapted to move longitudinally to engage andoperate said lever; and means operatcu by the driver on back pedaling for moving said wedge; substantially as shown and described.

at. In a coaster brake, the combination with an axle, of a hub revolubly supported there on; a driver; anonrevoluble, longitudinally movable sleeve upon the axle within the hub; a nonrevoluble, split brake ring supported by said sleeve, normally disengaged from the hub; a lever longitiulinally disposed within the hub, and entering between separated edges of the brake ring; a nonrotarywedge carried by the sleeve, and ada ted to move longitudinally to engage sai lever and operate it; and means operated by the driver on back pedaling for moving said wedge; substantially as shown and described.

In a coaster brake,the combination with an axle, of a hub revolubly supported thereon; a driver; a nonrotary sleeve upon the axle within the hub, having a radially projecting shoulder; a split brake-ring within the hub, held against rotation by connections at its outer end to a nonrotary part,

and in-line therewith, at its inner end, on-

ga ing the shoulder on said nom'otary sleeve;

l ever longitudinally disposed within the hub alongside the point of engagement of the said brake ring with the nonrotary sleeve, and entering between separated edges of the brake ring; and means operated by the driver on back pedaling for operating said lever to expand the brake ring; substantially as shown and described.

6. In a coaster brake, the combination with the driver 2 of the lon itudinally shiftable eonnector 23, having a on itudinal slit 29; the split spring band retar er 26 bent at one end to enter the slit in said connector; and means operated by said :driver for shifting said connector; substantially as shown and described.

FREDERICK S. ELLETT. Witnesses:

' LEONARD S. WHITTIER,

A. C. RICE. 

